Cycle deivim mechanism



(No Model.)

F. w. QUIN.

CYCLE DRIVING MECHANISM. No. 586,057. Patented July 6, 1897.

' INVENTDR,

UNITED STATES PATENT ,FFICE. a

FREDERICK YVILLIAM QUIN, OF SYDNEY, NEW SOUTH WALES, ASSIGNOR OFONE-HALF TO FREDERICK JOHN BIRD, OF SAME PLACE.

CYCLE-DRIVING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 586,057, dated July 6,1897. Application filed January 22, 1897. Serial No. 620,263. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, FREDERICK WILLIAM QUIN, musician, a subject of theQueen of Great Britain and Ireland, and a resident of 150 FlindersStreet, Sydney, in the Colony of New Sout h jyales, have invented acertain new and useful Improvement in Cycle-Driving Mechanimn, of whichthe following is a specification.

By means 0 this invention provision is made for operating the cranks anddriving gear of cycles where such cycles are driven by means of cranks,sprocket-wheels, and chain bands or in cases where the cranks are theprime movers and gearing interposed between such prime movers and themain driving-wheel, so as to dispense with the pedals usually attachedto the crank-pins and in lieu thereof provide short pins withfriction-rollers running thereon, specially constructed so as to bedust-proof, such rollers being confined within the guide-bars of a pairof slotted levers, so as to travel freely therein, one end of each leverbeing pivoted to the framework of the machine and the other end havingthe pedal attached thereto. These levers are so situated that thepressure of the drivers foot exerts a greater force or leverage upon thecranks as they rotate and changes the pedaling motion from a rotary to arectilinear. By this action a more effective force is applied to carrythe cranks over the deadcenter and to give increased momentum to thedriving-gear. In consequence of the increased power thus obtained thegearing may be increased and a proportionately higher rate of speedobtained by the same expenditure of power as'was necessary whenoperating the cranks with the pedals in the ordinary manner.

This invention may be adapted to existing cycles without removing theexisting system of gearing.

The invention is also specially applicable to ladies cycles, as the useof it, it will be found, does not result in such disarrangement of thedress as in the existing system of pedaling.

Referring to the drawi go which form part of this specification, Figurel is a side elevation of a bicycle, showing these improvements attachedthereto. Fig. 2 is a similar side elevation showing straight levers usedin lieu of curved. Fig. 3 is a plan showing the levers attached to fork.Fig. 4 is a detail, part section and part elevation, of frictionrollerand crank-pin. Fig. 5 is a sectional elevation of Fig. 4. Fig. (5 is adetail of a clip suitable for securing the stud-pins to the fork ofexisting machines.

The levers A are pivoted to the stud B, which may form part of anordinary clip and be secured by it to the fork O, as shown in Fig. 6.These studs may also be made an integral part of the framework of themachine. The slot D receives the friction-roller E,which traversestherein as the crank F rotates. Thisis accomplished by the driverpressing his foot upon the pedal G, the angle at which the levers areset insuring the proper motion. As the cranks F are rotated the drivingsprocket-wheel H, carrying the chain I, also rotates and operates thesmaller sprocketwheel J, secured to the hub K of the drivingwheelL. Wheneither of the cranks F are upon the bottom center and its associatedlever at the downward stroke, the slot D is so located as to offerlittle or no resistance to the traversing movement of thefriction-roller E. This facilitates the downward movement of the crankon the top center and allows of its easy operation by its associatedlever.

The position of the pedals G being in advance of the point where thepower operates the cranks, as shown in Figs. 1 and 2, gives an increasedadvantage to the operator and insures greater momentum in thetransmission of the force to the associated gearing.

The friction'rollers (marked E on Figs. 1, 2, and 3) are shown in Figs.4 and 5 in detail. The crank-pin M is provided with the screwed innerand outer cones N and O, which are secured in position with theclamping-nut P, and, together with the treble-seated cone Q, formchannels for the friction-balls R R.

Other friction-balls S S, of larger diameter,

are also held in position by means of the double-seated collar T and theouter cone U with its clamping-nut V. The aforesaid collar T is providedwith the groove W to receive the V-shaped guide-plates X, which are theupper and lower plates forming the slot D. This peculiar construction ofthe outer and inner ball-bearings admits of a contrary motion beingimparted to the two sets of balls, which has the effect of reducing thefriction incidental to the rotary movement of the cranks, and therectilinear movement within the slots D and the V-shaped guide-plates X,moving in the groove WV, prevents lateral movement and the displacementof the levers during the pedaling action.

The two forms of levers shown in Figs. 1 and 2 serve to illustrate themanner in which this invention may be modified, but in either case it isto be observed that the construction is almost analogous and the resultsobtained are approximately the same.

This invention is alike applicable to bicycles and tricycles whetherdriven by chain and sprocket-wheel or a train of Wheels or where motionis imparted to the drivingwheel by means of bevel wheels and pinions.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In combination in a cycle, the cranks, the bearing, the pins, theslotted pedal-levers, the guiding-rib X projecting inwardly from thewalls thereof, the collar T having a circuinferential groove fittingsaid guide-rib, the collar Q between the collar T and the crank-pin, andthe balls interposed between the collars T and Q and between the collarQ and the crank-pin, substantially as described.

2. In combination in a bicycle-gearing, the cranks the slotted levers,the crank-pins, the guide-rib X on the levers, the collar formed to fitthe rib and having balls S on each side of its interior rib, the collarQ having sides to hold the balls S S and the balls between the collar Qand the crank-pin, substantially as described.

In witness whereof I have hereunto set my hand in presence of twoWitnesses.

FREDERICK \VILLIAM QUIN.

Witnesses:

HARRY A. SMEDLEY, LEsLIE 'F. PHILLIPS.

